Burner for cement-kilns, &amp;c.



atented June 29, 1909.

z smmsfsmm i.

W. H. HARDING.

BURNER EUR CEMENT KILNS, 6m.

APPLICATION :FILED PBB.1,1907.

Patented June 29, 1909.

hiv

2 SHEETS-SHEET NETE@ wir PATENT ono-ii.

WLLM H. HARDING, OF PHILADELPl-UA, PENNSYLVANIA.

Patented Julio D f,

indication rilevi February "E, i901?. Serial No. 855.222.

ments in burners for introducing fuel into n.

coment kiln.

.My inve-Limon is partieularly miopten for use in convec'tion wirh s. kiln having a cyiin- 5 l .outh of thc kiln and 'E n hin for film ingr riui. 'i'he Jiizitcriul if; discharged bin into tho pit prior to ils ira-ingr io kiln. in thisy immncr lhc w-riid healed :md :i cortili propoli. n oi' il l honic arid gas is driven o l' hz nmcriwl.

dricol body portion .and u iront und rear l `hood, tha reas hood rmnminiicoting Wrh the stack and the front hood having ai?. opening lor the, discharge oi' the clmkrr,

The chf n ol" my invention is to imprm'c con motion oi' lne hui'ncr so that tho hiel Wii. he introduced under pressure to bho lriin in o more thorough nimmer than hereto fore, in order ihat the flame produoml will complclvcly drive o' the curhoro acid gos und reducc the, motorini to clinkcr.

.in lha accompanying drznngz-l `igure l, is s, sido vicv.' imrlff in scrtion of o kiln of the rotin-y type, illusimting niy invention :is arrngrd for burning pulverizod coa-l; Fig. 2, is im enhirgcd socir-ml View of thc burncr: Fig. 3, is 'n frimsvrrsc scc-tional View on the line S-, i* 2: :md 4 and ."i, are dcaii Views ol' fimdilirzriions. ol the compressed nir nozzle.

A is L ordinary E i5 rho ir ni hoo-d.

il is 'i-ho rf? hood or dust chzunher on which the stru-li l xnounted.

The iront hood l is mounted on mils in tho unimi manner, ond fhc outiet opening oll this hood communiczr' with the clinker pit I.

'The oylindricnl lhortionol' the kiln is supporefl r www und is driven by any suitah am one of the gears of whic. i mnshes nomini' rack a secured to tho mdrirzil kiln conslruclml in the 'iged at an inclination in -1 ,Pionieri and. the driving fen thijs the kik'. can be desired. The par ont of the -body of ihn kiln, the drawiis, is fully set i am n'ppiicntion for pntewn ont@ herewith.

' mi; ins-iones, I have shown u pit the! rear hood blow the A conveyor c" cui-rives the material from ii o hin lo tubes or troughs through which rho motcrinl parsscs to t'hc pill c. ln the bottom of the pit, in thc present instance, is conveyor .`-`,which rommunicntcs wich :in cleN voter c discharging' ino thc trough e lending to the interior ol thc lolo. This con lzio is `fully set forth und clnimcd in :insignification for patent hmm-ing @von darle hr with, and it will he understood hnl suitable menus nur? hc nord for iced.. nmteriul dircctly ino hrliiln from thc ns dcsirod.

D is n prinmry niixing chamhcs the. air and corbolmcoous Al'ucl orc lo* gether before being introduced into D is 1i secondary' mixing chrnnlwr non n'ected o'the' primary mixing i through a tubo d which cxtends from thc for-- Ward cud of the said prinmry chamber through the voor und of the second mixing chamber to a point near the .forward ond of Suid chanihcr, as clcarly illuslmtcd in Fig. 2. 'l`hc lohc is. supported by spidcrs d' as shown.

b u, 'tubo which extends l'rom. thc scrondary n'lixingchnmbcr D through :m npr-ning in thc front hood B. At the :wir of tho rhaunhcr D is u dzihlpbr d, which rrgr lhc :idmwsion of nir eli normal lomprri lo lhc sccondnry (flmlnhcr, llu: rmir of rhzmiher having pcrfomtions l'or the passage ol' nir.

Projecting through the roar hcml of. thc primary clnunbor D is n pipo l", haring: n, nozzle The pipo is prcfcrnlily rrcw threaded throughout its entire lcnglh und adapted to o screw thremlcd opcnng in tho rem' head d. On th pipo is n, lmndlcl" by which it is turned to rcgulzilc lhl` position ol the nozzlevin respect to the oprning m ihr end of the primary mixer l).

In the end. ofthe pipe F is :a smiling box f3 through which 'pnSSOS (.hl pipc l1v lraidih;r from an oir comprcssor llz or ol im' mczms lor supplying Compressed nir undrr high prcssure. The manhood d of thc prinmry mixwhich llli lo- Cn i enses?.

i i' l., new oi en' et normal teing'iereture'gltnougli these openings to the primary nninng ehem .hein

G is o tube through which the pulverized and air'under .pressure are introduced into the mixing elntniher. This tube is connected, in the present inst-ance, Withl s inn blower G', which in turn is connected by a. fine to the clinker pit l so that a, volume of hented air is drawn through the lue by the ian and forced through the tube G into the primary mining ehiiinber. l` he tube is reduced et g to forni c nozzle, es illustrated, and opening into the tube directly above this nozzle is a hopper g, which receives the pulverized fuel from the bin ll by means ol the conveyer hf, which is of the screw type in the present instance, but it will be understood that other types of conveyors may be used, if desired.

The ports of the burner ere so proportioned that s` leere volume ol` nir undercomparatively ow pressure is admitted lwith the powdered 'uci in the present instance to the primary ine' chamber, and While in this chamber 're nir and uelure intimately mixed and carried by the incomingy :tir under high pressure through the tube (l into the second mixing chamber. ./it the saine time there is drawn in from theresr o1 the prime-ry mixingy chamber 'e given quantity ot air et normal temperature and when. it reaches thei'orward end. of the seconden chamber thefniixture is supplied with additional nir undernorinal temperature entering ther-eer of' vsaid sec onde-ry mixing chamber. .rln'us, when the inilanunable lriixtiire' is introduced into the Kiln it is in proper condition. to be im'rnedintely ignited sind to produce o, suitable lisinol"ei-ing of thenmteriu-l unnozzle jininy he used, either the nozzle, es

lin Eig. 2, with s single opening, or, if desired, nspresding nozzle j et the type shown in et :and 5 may be use l.

the blower may be connected to e heater in steed of with the ciinler so that the air introduced into the primary mixing chamber will be preheated.

`While my invention hss been described particularly in connection with e rotary cerent kiln, it will be understood that my iinproved burner een be use Vl tor other purposes Without departing from the essentia features of the invention.

1. The combination in a burner of a primary and e secondary mixing chamber, the priniztry chamber having' en outlet tube eX- tending into the secondary chamber so as to terminate adjacent to the iol-Werd end thereof, ineans for admitting' air under atmospheric pressure to the rear ends -ol both chmnbers, :i conduit relatively large cross section connected to sources of fuel and of low pressure nir and enteringI the forward end ol the primary mixing chamber, with a high pressure air pipe entering the rear end of said hitter chamber and disehergingedjecent to the point of connection oi the low pressure eir and fuel pi e.

2. The com inetion in et burner of n primary and ay secondary mixing chzimber, the primary chamber having :in outlet tube eX- tending into the secondary chamber so es to terminate adjacent to the forward end thereof, ineens for erhnitting air under etmospheric pressure to the -rcnr ends of both chambers, a conduit of relatively large cross section connected to sources of. fuel and of low pressure oir and enteringV the forward end of the lprimary mixing chamber, with si threaded pipe ndjustably ei'itering the rear end of said letter chamber and terminating zuijaecnt to the point ol' connection ol the low pressure `air and fuel pipe, und uv high pressure sir pipe connected to seid s djustablef pipe.

In testimonyT whereof, l have signed my name to this sl'ieciicstion, in the presence of two subscribing witnesses.

Wlliliiilii il. HAltDlNG. Yivi tnesses "Krimi 'lnALn-e,

Grao. A. Cinner. 

